Numerical Simulation of Soft Ground Vibration Caused by High-speed Trains

摘要

The soft ground vibration caused by high -speed trains is an important issue which needs to be carefully investigated. In r this paper,numerical simulation of soft ground vibration is conducted by using two models; the train-track interaction model r and track-ground finite element model. The train-track interaction model is built on basis of the vehicle -track coupled r dynamics theory and mainly used to get the excitation forces on track structure and soft ground. As an example ,the typical r field test of soft ground vibration caused by high-speed train X-2000 in Ledsgard of Sweden is numerically simulated. The r dynamic responses of track -ground model under the low and high train speeds are compared. Large amplification is observed r in the ground dynamic response when the train speed is close to the critical value.